What is hot-reloading exactly, is it just another fancy term for live-reloading?View other answers to this thread
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TL;DR It's like live-reload applied to a single module (in terms of JS modules), you change a file (ReactJS component/ redux action or reducer), kick save - the module reloads almost instantly and you see the changes in browser WITHOUT RELOADING THE WHOLE APP. It might be hard to set up.